In December 2016, McCray worked 56 hours and 35 minutes — about 31 percent less than what she worked in December 2017.

The public schedules only reflect a “snapshot” of the first lady’s working hours, spokeswoman Kate Bernyk said.

Still, the increase in McCray’s publicly disclosed work hours reflect her growing — and unprecedented — role at City Hall.

As de Blasio’s “closest confidante,” McCray advises him on everything from policy to personnel decisions, often interviewing City Hall job prospects. She is now participating in more staff meetings, phone calls and public events, as The Post previously reported, and is taking more trips outside the city without her hubby.

In addition to managing the Thrive NYC mental health program, McCray chairs the Mayor’s Fund to Advance New York City, the city’s nonprofit arm that raises money for public-private partnerships.

“As the initiatives and projects that the first lady leads grow, so do her hours,” Bernyk said, pointing to new city efforts around addiction, domestic violence, incarcerated women and LGBT youth that have been rolled out in the last eight to nine months.

While McCray is barred from getting a city salary for the work, she has a full-time staff of five, making a total of $662,552 a year.

see also

“She works full-time. It makes no sense to me,” de Blasio said March 7. “I don’t understand it, because if someone’s working full-time and is a professional with a lot of background and applying themselves, I don’t understand why they can’t get paid.”

“She can’t get paid, so she’s doing it as a volunteer, but she’s doing it 110 percent,” de Blasio added.

“We’re concerned by volunteers who are not paid doing work for the city in very high-level roles and it’s not clear to us which ethics laws they are subject to,” said Alex Camarda, senior policy adviser at the good-government group Reinvent Albany.

McCray has said she would consider running for city office at the end of de Blasio’s second term in the 2021 election.